Magento 2, call external web service when order is placed - web-services

Question

I've been digging around and I can't seem to find the answer to what I'm looking for at all.
I need to call an external web service when an order is placed in magento 2. I also need to use the order information in the call. I simply dont know what the right path is. Has anyone done this before?

Answer 1

I know the answer is late, but here is the solution that works for me, I have written observer for event checkout_submit_all_after.
Create file at path [CompanyName]/[ModuleName]/etc/events.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
<event name="checkout_submit_all_after">
<observer name="push_orders_to_purchaser" instance="RLTSquare\Quote\Observer\PushOrdersToPurchaserApi" />
</event>
</config>
Now in observer ([CompanyName]/[ModuleName]/observer/PushOrdersToPurchaserApi.php)
<?php
namespace RLTSquare\Quote\Observer;
use \Magento\Framework\Event\Observer;
use \Magento\Framework\Event\ObserverInterface;
use Magento\Framework\HTTP\Adapter\Curl;
class PushOrdersToPurchaserApi implements ObserverInterface
{
const MOCK_API = 'https://yourwebsite.com/insertorders';
protected $_request;
protected $_webApiRequest;
protected $_serviceOutputProcessor;
protected $_zendClientFactory;
public function __construct
(
\Magento\Framework\App\RequestInterface $request,
\Magento\Framework\Webapi\Rest\Request $webApiRequest,
\Magento\Framework\Webapi\ServiceOutputProcessor $serviceOutputProcessor,
\Magento\Framework\HTTP\ZendClientFactory $zendClientFactory
)
{
$this->_request = $request;
$this->_webApiRequest = $webApiRequest;
$this->_serviceOutputProcessor = $serviceOutputProcessor;
$this->_zendClientFactory = $zendClientFactory;
}
public function execute(Observer $observer)
{
/**
* #var \Magento\Sales\Model\Order[] $orders
*/
$orders = $observer->getOrders();
$encodedData = null;
if ($orders) {
$data = $this->_serviceOutputProcessor->convertValue($orders, '\Magento\Sales\Api\Data\OrderInterface[]');
$payload = \Zend_Json::encode($data, true);
$client = $this->_zendClientFactory->create();
$client->setUri(self::MOCK_API);
$client->setConfig(['maxredirects' => 0, 'timeout' => 30]);
$client->setRawData($payload);
$response = $client->request(\Zend_Http_Client::POST)->getBody();
//play with response here...
}
}
}